Electricity
From Wikipedia, the free encyclopedia
Electricity is the science, engineering, technology and physical
phenomena associated with the presence and flow of electric
charges. Electricity gives a wide variety of well-known electrical effects, such
as lightning, static electricity, electromagnetic induction and the flow of electrical current in an
electrical wire. In addition, electricity permits the creation and reception of electromagnetic radiation such as radio
waves.
In electricity,
charges produce electromagnetic fields which act on
other charges. Electricity occurs due to several types of physics:
§ electric
charge: a property of some subatomic particles, which determines their electromagnetic interactions. Electrically charged matter is influenced by, and produces,
electromagnetic fields.
§ electric
current: a movement or flow of electrically charged
particles, typically measured in amperes.
§ electric
field (see electrostatics): an especially simple type of electromagnetic field produced by an
electric charge even when it is not moving (i.e., there is no electric
current). The electric field produces a force on other
charges in its vicinity. Moving charges additionally produce a magnetic field.
§ electric potential: the capacity of an electric field to do work on an electric charge, typically measured in volts.
§ electromagnets: electrical currents generate magnetic fields, and changing magnetic
fields generate electrical currents
Fuente:
Wikipedia